Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '168aee6e152f7c181ed35dfa82077eb8d4071d78e5c27daa857d194379d5671d' 
  AND token = '1dRBXQWPWdcQnzInZ93kGQdpAbHg5JNn+LPXnIjuIvs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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