Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f81e8bf4c4e09b2b98f3414a080e948952e84426efa40d83a419a32c7ef69d44' 
  AND token = 'hfnXYGAb6DwlNKeukl+LFS1rOHE99Aw5H05RLHO9JEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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