Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b85cdb44fafd029deb0743342c37d8c0740115e913795fbfa3f42521c084ae83' 
  AND token = '6FiehO1rmWB+7YJcsQL94E7qe1NIcDzXQq+X8Ai7dEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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