Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1435f41e8ea45470d1d0903cd3af61013f8b7a4b535182bb73a9a571e6b8d1b' 
  AND token = 'rW8LDCGVYZwFI1q+DEtoeQ93AXb+qUZLxNsJe3fhe/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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