Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27efe931a17c44d7c8bfc5d267713cac5f1f0fa42dcdcf08544a0fccb2f30ac9' 
  AND token = 'EjXZYakIIzCSppboNoJiNH1eIim+fNABF12W7yNucP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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