Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50b7a61d53cb3488939c579c28746ee924ae8b56ec6e4ae26c2a51802020b4b1' 
  AND token = 'IOrwvZgSZjw3f+kOcFI+MJrUhLnWabAV8Jq24ZBDNMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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