Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'deac1b65ddcb2494691f75b32e75628bd7eb312f200a74dc1eba471e2ad2b68c' 
  AND token = '+yW3+w9TAjK4h8KfQ0pbJ4l0lGnQTA4B0IBYoR2ugMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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