Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '948b0f871b7f4c31d220bcf680d53a0978cfa5d98b41731ffd253dad47430359' 
  AND token = 'ZskG+GkcHM7AVI6skTcEXL2kwnG42NNofeCvbiBwJ44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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