Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6deb1272c8400e9390d09431c6563bb130e47973b6e2f06f6d4bd8400b8d4004' 
  AND token = 'B6WJFsVvngeaXdBXBsYTdY1fG0PLo8wZ4RlRAIiycgc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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