Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c3081f61c5f0016b8ec5210c37cbde91ede59fcaf829c78b6448f955db3108d' 
  AND token = 'O+UmnyZ3HaTCr/dmYdL946u2IA8+CDFH700Z02kT15Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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