Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a87d5273346cc20a963f57fc0b76e9319a31bf2f227f2c5e73f39988ee54076' 
  AND token = '/FwFFdLri37/T0fikKBumYcHqHdvzXDDe7OPSvlleU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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