Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2525f5156811f8cc2204f0900c605447a41d50edaaea482bff310d9cb7088c2' 
  AND token = 'YcsNJk9nZeOKyoE+BNtk/M6K1MH1nTypt81iLmpoQug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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