Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ed87e30df84f824dbe8a19248c3090da05a930b71d687f19d3e252db15566b8' 
  AND token = 'W2N2STUdmsJJjiVtDOCu1YDKOec18Bs4/oQ5DJc13YI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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