Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '798517824b0bd2af9c9b7ebb16d5528bf5712902756587a395a1336867626bd1' 
  AND token = 'BiHYbE7MUBVPo9+2AU2raxXSJf1by8NTP6UdKafrOg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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