Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3fa38c71f30911b2521f37327b24b8753bb5bd6ab9d84578a07c681bf057183' 
  AND token = 'aCpbTv/YQ18BWVGPj3Mbd/SHk/0tXSg8S6TnxqFZx8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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