Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '180916ba77ae1769db2bd543c31e7ba9e28f3a00363f070550950978274ad04d' 
  AND token = 'gAmB+e+y5qkvLOzS8T/4RFQ+7uaTnW11obAqlvE5Lag=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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