Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c88ca55a48b8bf50055dcf88cdcc99a31f76b805153fe2572f4cb23a8b8d36c' 
  AND token = 'q2Xm7Qv1uPoQ/KEpeW6C3DEtWVchQAJajrYr0aMUOyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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