Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc0f44dc08f3df6b293e44cb17253aaae8979e8257ca3a00c434111994035136' 
  AND token = 'Dgi7AP8uHt17GA22OA68lbhDSWnqvvcDTs1JBLuAy9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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