Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f749bfbdf542241b4fff6eafb2994b659723b7f4ee1718772249273bf2ce6287' 
  AND token = '+iBvaRaFYckL1K6GpQmkd+ss1rztZ/GHkdIBftZNpCE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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