Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec986484f152b5606fb547b78342a079571e5085813698dc96ad97bf2aa9e9ee' 
  AND token = '1m2eVU5gD020W0077kMSNv/WwWfQDCRHCECM3i+ZubI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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