Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecafd3d4268ef29b29431a6dd95f15abd31e9ad3afb0932ed5817027771a8e4c' 
  AND token = 'YgNS48JSEPdPjYPEsmdWVWXSAGAHVnY6FZ8ausNSbHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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