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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '760597dc98a7bd1a6f80ddd5281d1dfdf5ec1120f52b0a9c837fbbcded9098fc' 
  AND token = 'wbynoVYFp2VBldsbq3Tc0A21nttC9Azej+nyW8Elv5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}