Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b682feb579d67b0f92807327fc51d9c80d4ae260ddf7af4b3bb7c8b42ebbd82' 
  AND token = 'ah3qiTTFTdL3vfJ6wgM8HEJyWM4JT2x/xV6x4ecIsO0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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