Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7fef6bc355ecb4d47758a0e46f9eaab8307b09358012209958063745da53f88' 
  AND token = 'I42t2Jx5aJAvlsYYzibfEfUBLiWCokWHUHJZm0bwD6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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