Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88b3376bd2eb02b40713586cec22fceb027cbe9c1b9bf46fd4ceec175c02bc0d' 
  AND token = 'wxMhgbB8QavyS19+dD0evMUHpc1nbWJeLPfcILNRWF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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