Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed56eda286b1c9d038bda4d75ce21de9045ecc92864ef8fc978ccbb03c2ef61c' 
  AND token = '8/5bBfh39KaHQUqpFuNL12f/B8bqlimonnePv5LLgi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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