Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b2b7929b3a0a3fc28c4d1c17e82dfae2a9334e8a0146edead135f91d3b85d84' 
  AND token = '6YSUJ85q5iVsaHmPBqx+/l355x5eHkNQIEOyntc2xbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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