Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79d7366e208d2a09a577cbb133497c36416c1da0eaebf7bb658b03d14ecb689f' 
  AND token = '82EAJQryOLy7II3cCI0INi9Vs2RPpN+Rue9FmN9iJ3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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