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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bbb7bccfc4a1f8dea90657dd4d7fb26bc1944ec6d9ff515a643a6dd28f58d3d3' 
  AND token = 'IAEyAP6TXx8ntRp3YvBMW21eWTTevswf6gl9k6KN6mU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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