Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3dd17a0d9b30588086d8ca2c31b01b379824fb628fe43c2f456a2091d26c1e7' 
  AND token = 'he6NgoSAfm567wD4zRL+tqelguElqo+0XNv7fmryFPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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