Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd98d5e8b22511e23a77e01439f26173d4317ea5965db010846edf440689515e8' 
  AND token = 'DE15ldDtLxgsYHIS4F1vlh0zbEN+jlSoIAyWTJwu3AQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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