Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45ab4b869f789436ef26eb3b776f2ff4ef611a6900adba78798281664447106d' 
  AND token = 'jVhVWrvQcV90DtZ5teHJPN+rfuUHHeOSmZpmv6d6jGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}