Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45d4140d4c68b8bc434eb6a2e222ea6ebd8f2f8297ca6bcc90182f5a2eea8a2b' 
  AND token = 'I+j2w1ELjcuhXDlyZGU5JrVy/sZoDxICQghrdw8KS0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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