Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8a0fe551c051405d8b2ff29f6121d70eb6a2a5e3a0f9015cfbb0aea3ab84673' 
  AND token = 'UE60P34rK4/sRIttzwEKCEVPxfIRBxTph89RA9KGZzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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