Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0a1bd84296a1e817fbcab872cccf6cf0687734cd055ec54f495473789eb82fb' 
  AND token = 'u/W0DveyvwOATcMUSU9rNSCSCX5UAwEq0PpRuHrAWmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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