Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42a2b55cc9f6e54673dbdb9761ef286de8052c53d2c8765d88f70445a1512343' 
  AND token = '0WbnKvz6LyLB2caguAfztKgmQ3Knp9O8aE/s3zqIAyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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