Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4caa72cc3797d10d277d514041554333d3a984ead586f5b0d4b91ba0b6410d88' 
  AND token = 'pc50MCWB/gnVgVdIoSK0DgwVY6gna35uUibwD/GYaGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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