Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc50b21ac8c11180bf3f0a01cb578ac7548cbdec29dba6a5372494bacd95d902' 
  AND token = 'twhcWjqDbCUGrqpCUcZjicjU/mt8QKsesfGhrNXURTk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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