Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ca720063ba11f27b9cea19d0f67cb542525f445b615c8653de845d4f3d4e4f8' 
  AND token = 'svcRTKFC+MLC0EKrp879hpgCa2yTD6+a1cDKM9m8Ilo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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