Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c149d8d2427d83aa0073d74b0b71d9a58057703b3482ebf49807300e5e4c0d63' 
  AND token = 'jJCsCcZw9CMWgYcQdt95COOna4PhGdFz1VAiLKdBzZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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