Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ea84cdb761f875a5a949864e2b3166dad86e7442f221e8be396c4d04173a40d' 
  AND token = 'MfwwGPeCXOwLGCd4CtQ/xTF6uSF6y4asaNg++XrTe8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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