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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6eabdcce48861be740ced24ea8f5a3865775248fb621f08071f92831b977982b' 
  AND token = 'jzpY36Jx7U1lqQyuhs7Na7qdp0YV8LV2rmCNjJqCS0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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