Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '623a631e23f0486731944af247599d11f24505a280beecad58a1212fac260135' 
  AND token = '9tZ2atSA0Ceko9nmFr6TXrwM8l4eEi3rzp8TP2bMq48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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