Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc6d772b401cbd363952f0204e50b7442efa8bff78964c01acbbcf8a00ee09f4' 
  AND token = '9xnsXlf8uCWPtbNxfv4/IooG7HsIX8fjOFk1jFr5S7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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