Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cec674d84d35492b8fd0542501fdd29b13069c1b6ec8be4178302454a1230041' 
  AND token = 'lKxa/Q8pSIvwFfyJHWyCI03eftDxECTgz/Erv3bxc74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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