Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac066577048258e44bde65d47feaa0c85bbddb0a1eec261180c31f2d42bd490e' 
  AND token = '41hX5EtYgbQf8ZnL5rCqTE0E/hKwDvPVNRtIQKEWmtY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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