Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e349707602fc67a2b56bbf5295618cbb8c2f87b37c90c7f633d1b09c511c09cc' 
  AND token = 'IiuH0CJZTmbfR4mU5ct9wXJpyOYe2WhJZH7gs0kl5BQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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