Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64a67cc452d82a153ad873e3e90850425f3084c2cb31f986834f572a689e72c1' 
  AND token = 'VWbwTDMnD3w2Idkn/idQfSdlNQOSVyT2Avh1YW2OPwA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00071

JSON explain

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