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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c1d18c3052dcb4d344de6b0b11a7d617a58eb75b8cdc9aea36deb44ca67f341b' 
  AND token = '71EmU5y58i5q9bXK6hDjFl+U2s3ikrUOviJFUL/6U5E=' 
  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"
    }
  }
}