Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a07d6000e225525c9739b5f25fd12b6e5ffcb9b2edcff452cb1dfd33d5cce868' 
  AND token = 'MQcWoA74Ya0eZuIV5D7I2A5EjGazqJFyt6Cgzku6Iq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}