Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8fc970bbb1b9c9b2f51d4c5bc0e06d60a32a57bb56f3ca19a715a5ea9dba094' 
  AND token = 'NVemgJSq3fV8rYD6ZLcbobzl5oxmNWTO0zDmN6xdujE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}