Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c95e9a0891ea3d418f2b85e75ec6899b4a0fa1d3e2f15c0ad79b59829ba115c' 
  AND token = 'xe51sWXUA/YgqCuhs29CHDMMy0yoowoijrRheA6pcRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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