Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0705e0560bc0b7e588a091e31d78b61ec464b62ce5078f2a30a15ee429678896' 
  AND token = 'JRJa7IvPdVj6RjO+phSTU/3TJktkDLBIcDSZwLpWgxw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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