Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48b778f58f3af6fbd11134efc86489ac67c4a7f0b96b3aa403fe6cf407a4d664' 
  AND token = 'b5cKKnrnXyqXXjY2V33ad205cPj5t5rR2RBCRCVWXRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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