Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34c2c1734d3f631132363ff5b0b302c4398e20ba1a54ab90152b1ff2b9c0b231' 
  AND token = 'qAT31o+XKPJol5zrmwftbob1qk44KmHgKeMQDtHDkaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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