Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97a41315ae847b51637f505abc7065afd76504ef367743090709b5ee8a18c34e' 
  AND token = 'mj1suiCSEGuUw0JS6pFeqRNW6gskhaCJkVBPPCvzDBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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