Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd08cecac155e7f6236d4ac2b5849953413c40ca79f53d65168b9c1d1d03301c' 
  AND token = 'bQ0b3whnJupoq2k9totNNZ36ha/0DqO8Pbm5j1c9bYk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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