Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b44b525b35c5af3dc2511f3d266bd4b70d358de9ab28a0125707ae2cb609243c' 
  AND token = '9+NobQTer9BMwPFylRixoidq2UB6qS7/V0/w2/kA1GM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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