Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '726f27d5249cd9ddf715221b9f4cfff47a7c66201bd73a13a503a341a8580708' 
  AND token = 'Ng4y+jO760zFPOq1omQYH5jmdUIe/v97N627jU7H+qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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