Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91ca3ddf5eef04233bd5c0e84fe274fdd1e9905343d80cc30a3e41c09bb991ea' 
  AND token = 'hFd4lawFQAMTlaXiFAmU3hsu80W/dZnxOVHYxB6X9tI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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