Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7aee79a0271abf4d7dcbe7233d4c76f0c20294eb32934110dbe74d2b3789cbbc' 
  AND token = 'smNifoEebRR1ZfVCUCBCKUWz5q2l6CpLJBwixsQeBzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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