Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6321fc7e61e27a7dac98675630c04ba5a6bf20dc9b9a1f502f2df7c19735a63d' 
  AND token = '65lxu1wQNvUShuhap/+twgKGHb5rQsMYUum4f76bArw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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