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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e39830af8fa76572b9dce1d8cb103ddeefa1bbe7db8207cb08c5e150a247f3ef' 
  AND token = 'yPExT2JxK04XqotHGNl/XFz+Zeq0jfi434MTeA1ZK98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}